Blade for a seafood shell cutter



FIG. 1 is a front perspective view of a blade for a seafood shell cutter showing my new design;

FIG. 2 is a right side elevational view thereof;

FIG. 3 is a left side elevational view thereof, and

FIG. 4 is a front elevational view thereof. 

The ornamental design for a blade for a seafood shell cutter, substantially as shown and described. 